/* 弹性布局 */

.fdc,
.jc,
.ac,
.as,
.jac,
.jsa,
.jsb,
.jsbw,
.fw,
.jend,
.aend,
.no-blank {
    display: flex;
}

.fdc {
    flex-direction: column;
}

.jc {
    justify-content: center;
}

.ac {
    align-items: center;
}

.as {
    align-items: flex-start;
}

.aend {
    align-items: flex-end;
}

.jac {
    justify-content: center;
    align-items: center;
}

.jsa {
    justify-content: space-around;
}

.jsb {
    justify-content: space-between;
}

.jend {
    justify-content: flex-end;
}

.jsbw {
    justify-content: space-between;
    flex-wrap: wrap;
}

.fw {
    flex-wrap: wrap;
}


/* 空处理 */

.no-blank {
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 13px;
    padding: 10px 0;
}


/* 一行显示 */

.onerow {
    width: 50px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}


/* 三角 */

.triangle {
    width: 0;
    height: 0;
    border-right: 10px solid transparent;
    border-left: 10px solid transparent;
    border-bottom: 10px solid #000;
    transition: 0.3s;
}

.triangle_top {
    transform: rotate(0);
}

.triangle_down {
    transform: rotate(180deg);
}

.triangle_left {
    transform: rotate(-90deg);
}

.triangle_right {
    transform: rotate(90deg);
}


/* 箭头 */

.arrow {
    width: 10px;
    height: 10px;
    border: 1px solid #999;
    border-left: 0 !important;
    border-bottom: 0 !important;
    transition: 0.3s;
}

.arrow_up {
    transform: rotate(-45deg);
}

.arrow_down {
    transform: rotate(135deg);
}

.arrow_left {
    transform: rotate(-135deg);
}

.arrow_right {
    transform: rotate(45deg);
}